柴油机SCR后处理系统控制单元开发与试验验证

摘要

SCR technology is an effective way to reduce NOx emissions of diesel engine.In this paper,the control unit of SCR system based on the MC9S12XS128 hardware and the calibration diagnosis tool based on SAE-J1939 communication protocol were developed,and the control strategy was compiled.The feasibility of system was validated on the test bench.The experimentresults show that,the engine's NOx emission was reduced by 80％.%SCR技术是降低发动机NOx排放的有效手段.基于MC9S12XS128芯片和SAE-J1939通讯协议,设计开发了SCR系统的控制单元与标定诊断工具,并编制了控制策略.最后在搭建的试验平台上验证了系统的可行性,将原机的NOx排放降低了80％.